MEASUREMENT OF THE ACTIVITY CONCENTRATION OF A SOLUTION OF SE-75

被引：6

作者：

RATEL, G

机构：

[1] Bureau International des Poids et Mesures, F-92312 Sèvres Cedex, Pavillon de Breteuil

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1994年 / 339卷 / 1-2期

关键词：

D O I：

10.1016/0168-9002(94)91841-4

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The activity concentration of a solution of Se-75 has been measured at BIPM as part of an international comparison organised on behalf of Section II of the CCEMRI. Two methods were used: the traditional 4 pi beta-gamma coincidence technique and the selective sampling method. The results agree, however the values have to be corrected because of the presence of a long-lived intermediate state at 304 keV. The beta spectrum has a complicated structure, and therefore the extrapolation to a beta efficiency of 1 is not straightforward. Different threshold settings are discussed for performing the extrapolation. The measured correction is compared with the values obtained by a calculation which uses tabulated data.

引用

页码：408 / 413

页数：6

共 6 条

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